How to convince my grandma to get me a laptop for christmas?

my grandma is always buying expensive junk because my grandpa never let her buy anything they did not need. she is redoing her entire house and it is almost done, but she is not staisfied and itchiing to spend money on me and my brother, but then is very, how should i put this, oblivious to the world and what i want. EXAMPLE: for my birthday, i asked for a new cell phone. she got me a walkie talkie. for christmas, i really want a laptop because i hate sharing a slow computer with 4 people, and my moms virus protector is always deleting my things. how do i convince my grandma to buy me a laptop for christmas? money is no object, because my grandpa never spent money on anything and left her a lot of money when he died. whats a good way to drop hints?